Pencil-sharpener.



E. H. KLABER& S. WHITEHEAD. PENCIL SHARPENER.

APPLICATION FILED DEc.1 9,191o.

1,050,770. Patented Jan. 14, 1913.

2 SHEETS- SHEET 1v commun;` PLANOGRAPH C0..W5H|NGTON, D. c.

E. H. KLABER & S. WHITEHEAD. PENCIL SHARPENER. APPLICATIONP1LBD'DEG.19,1910.

1,050,770. l Patented Jan.14, 1913.

2 SHEETS-SHEET 2.

,//v VEN f ORS' WIT/VESJES M 0, /l/an// COLUMBIA PLANUGRAPHCo.,\vAsHxNGTON, n. c.

'UNITED STATES PATENT OFFICE.

EMILE HERTZ KLABER, 0F LONDON, ENGLAND, AND SAMUEL WHITEHEAD, 0F BERLIN,GERMANY; SAID WHITEHEAD ASSIGNOR TO SAID KLABER.

PENCIL-SHARPENER.

Specification of Letters Patent.

Patented Jan. 14, 1913.

To all whom t may concern.'

Be it known that we, EMILE HERTZ KLABER, a subject of the King of GreatBritain, residing in London, England, and SAMUEL VHITEHEAD, a subject ofthe King of Great Britain, residing in Berlin, Germany, have inventedcertain new and useful Improvements in Pencil-Sharpeners, of which thefollowing is a specification.

This invention relates to improvements in pencil Sharpeners and refersto devices of the kind in which the pencil is held stationary and thecutting effected by a rotary cutter which is arranged at an anglerelatively to the axial line of the pencil and mounted upon a suitableframe which is caused to revolve around the pencil during the cuttingoperation.

The present invention has for its object to provide means whereby thefeeding of the pencil by hand is avoided and the said pencil is pushedforward during the cutting operation automatically. Provision is madewhereby a sharper or blunter point may be produced upon the pencil asdesired.

Means are also provided for holding the pencil central and indicatingwhen'the point is formed and for automatically checking the cuttingaction.

In order that the invention may be the better understood, drawings areappended in which Figure 1. is a side elevation of a machine embodyingthe present invention. Fig. 2. is a longitudinal section. Fig. 3. is aplan. Fig. 4. is a front end view. Fig. 5. is a similar view with theouter plate removed. Fig. 6. is a side view of the block supporting thepointed end of the pencil. Fig. 7. is an end view of said block. Fig. 8.is a plan of same. Fig. 9. is an elevation of the means for effectingthe longitudinal movement of the block. Fig. 10. is a plan of same. Fig.11. is a side view to a somewhat larger scale of an alternativearrangement of the guides for the device for holding the body of thepencil. Fig. 12. is an end view of the said guides. Fig. 13. isa sideelevation showing a means for regulating the length of the point of thepencil. Fig. 14. is a front view of the means illustrated in Fig. 13.Figs. 15 and 16 are respectively a side and front view of an alternativearrangement for determining the bluntness or otherwise of the point ofthe pencil. Fig. 17. is a side view of an alternative means for limitingthe movement of the pencil carrier.

Referring to the accompanying drawings, 1. indicates generally the frameof the machine which is substantially of the usual form andconstruction. Tapped or otherwise secured to the end plate 2. of themachine are pins 3. to the ends of which is secured by nuts 4. a plate5. The plate 5. is provided with a central perforation 6. for thepassage of the pencil. Slidably mounted upon the pins 3. is a circularor other shapedplate 4a. perforated for the passage of the pins 3. whichpins form supports and guides for the plate 4a. In order to prevent theplate from becoming jammed upon the pins 3. sleeves may be provided asshown at 7 which at the inner ends are `tapped into the plate 4a.

against the inner surface of the plate 5.- i

The tendency of the spring 8. is to force the plate 4a. inward and thestrength of the spring is such that, as will be presently described, itkeeps the pencil against the cutter with a suflicient pressure to insurethe proper cutting of the pencil. The cover 9. is perforated at 4b. thecenters of the two perforations 4b. and 6. being in line and sopositioned with regard to the cutter .fr that the center line of thepencil is coincident with the center of the circle described by the saidcutter .fr in its revolution. In order to secure the pencil, the plate4a. has pivotally secured to it a number of jaws 9a. Figs. 2, 5, and 11.The jaws may be conveniently mounted upon the sleeves 7. as shown inFig. 5. and they are each provided. upon their inner surfaces with a pin10.

A engaging radially inclined slots 11. formed in a disk 12. revolublymounted upon an extension 18. upon plate 4a. see Figs. 2. and 11. Thedisk 12. is provided with a projecting arm 14. and is under theinfluence of a spiral spring 15 contained in a cavity or recess 16.formed in the inner face of plate 4a. see Figs. 2. and 11. The tendencyof the spring 15. is to keep the jaws always closed, and in order thatthey may be opened, the disk 12. is rotated by the arm 14thereon, and inorder to facilitate this operation a second iinger plate or piece 17.

is secured to the outer face of plate 4a. By

this means a slight pressure of the finger and thumb upon plates 14. and17. will cause the jaws 9a. to be opened to permit the passage of thepencil and when released the jaws will close upon the pencil whichthereupon comes under the action of the spring 8. before referred to.The end of the pencil being operated upon and which pencil is indicatedin Figs. 1. 2. 3. and 4 by y, is supported in a tapering V shaped slotformed in a circular block 18. which block is mounted upon the bodycarrying the cutter.

Provision is made for preserving the alinement of the block, said meanscomprising a screw 19, shown in dotted lines in Fig. 2 and in full inFig. 13. The screw at its upper end is provided with a pin 20 engaging alongitudinal slot 21 in the underside 4of the block 18, Figs. 2, 6, 8and 13. The longitudinal movement of the block is effected by means ofthe pin 22 Figs. 2, 9 and 13, which pin is provided with a projection 23disposed eccentrically with regard to the axis of the pin (see Fig. andengaging a laterally disposed slot in 23EL (Figs. 6 and 8),in theunderside of the block 18, which is substantially circular as shown inFig. 8, fits within the hole 18, (Fig. 13), formed in the body carryingthe cutter m for the passage of the pencil to the cutter. By turning thepin 22, the block 18, according to the direction of its motion, causesthe block to be advanced toward or withdrawn from the cutter.

In order to limit the inward movement of the pencil so as to avoid wastethereof by the continued cutting of the wood after the point has beenformed, a plate 24. is provided upon the end of the block 18 and whichplate may be pivotally mounted upon the block, so that where a speciallyfine point is desired, it may be turned downward clear point has beenformed, a plate 24. is provided for the plate 24, as shown at 25 in Fig.3. The plate 24. may be shaped as shown in dotted lines in Fig. 14. andbe secured to the block 18 by means of a screw 25. When the end of plate24. is in the position shown in Fig. 14. the end of the pencil shutsagainst the inner face of the plate. When the plate is turned into theposition shown in dotted lines in Fig. 14. the end of the point comesinto contact with the inner surface of the head of screw 25. and afiner.

241. screwed to the end of block 18. with a collar between the platesand having a head. By turning plate 24 into its inoperative position, amuch finer point can be formed and by turning plate 24a. into aninoperative position, a still finer point, as the pencil will moveforward until the point comes into contact with the head of screw 24".

As an alternative arrangement to that shown in Figs. 1 to 5, we mayemploy that illustrated in Fig. 12. In this case only two pins such asthose 3 before referred to are employed which are connected by means ofa curved plate 25. In this case as also in the construction firstdescribed, provision may be made for positioning the plate 4a. so thatit is moved only a sufficient distance necessary either to form a pointupon an uncut pencil or to sharpen one that has a broken or worn point.In order to effect the above object we may employ a knurled nut orsleeve such as 26 Fig. 11 which is provided with an internal screwthread engaging a screw thread upon one of the pins 3 and which nut isturned one way or another in order to increase or diminish the distancethe plate 4a. may be moved. Instead of this arrangement a sleeve such as27 Fig. 17 may be mounted on pin 3. having a slot 28 engaging a pin 29tapped into said pin 3. Slots 30 and 31 are formed leading at a rightangle out of the main slot 28 and by rotating the sleeve it may be movedlongitudinally on the pin 3 and the pin 29 engaged with either slot 30or 31 so as to vary the limit of movement of plate 4a. on pins 3.

When in use the plates 14 and 17 are pressed by the finger and thumbcausing the jaws to open when the plate 4a. is moved away from thecutter w until its movement is either considered sufficient or islimited by either of the means such as those above described. The pencilis then introduced and pushed along until its further movement ischecked by contact with the cutter when the plates are released and thejaws engage and hold the pencil. When this has been effected, the pencilis advanced by the spring automatically as the wood iS cut away untilthe point is formed when its further advancement is checked.

Claims:

1. In a pencil sharpener, the combination of a revoluble cutter, a chuckfor holding the pencil, means for moving said chuck longitudinally ofthe pencil toward the cutter, adjustable means for limiting saidmovement, means for supporting the end of the pencil, and means forchecking the feed of the pencil to the cutter, substantially asdescribed.

2. In a pencil sharpener, the colnbination of a revoluble cutter, achuck mounted upon guides parallel to the axis of the pencil, a springcoiled upon one of said guides and acting, when compressed, directlyupon the chuck to move the same toward the cutter, adjustable means forlimiting said movement, means for Supporting the end of the pencil, andmeans forchecking the feed of the pencil to the cutter, substantially asdescribed.

3. In a pencil sharpener, the combination of a revoluble cutter, a chuckfor holding the pencil, means for moving said chuck longitudinally ofthe pencil toward the cutter, adjustable means for limiting saidmovement, means for supporting the end of said pencil, said supportingmeans being capable of adjustment longitudinally of the cutter by meansof a revoluble member provided with an eccentrically disposed projectionentering a recess in the support, and means for checking the feed of thepencil, said means being adjustable to produce a fine or 20 blunt point,substantially as described.

In witness whereof I have hereunto set my hand in resence of twowitnesses.

EIMILE HER'IZ KLABER. Witnesses:

ADA MARIA BERGER, ADELAIDE FUNK.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

SAMUEL WHITEIIEAD. Witnesses:

Y OTTO MOLDENBAUM,

ELSE WESTPHAL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patenti, Washington, D. G.

